Differential geometry of curves
- Answers.com encyclopedia entry on Differential Geometry.
- http://www.answers.com/topic/differential-geometry-of-curves

Non-Commutative Geometry
- A short historical review is made of some recent literature in the field of noncommutative geometry
- http://arxiv.org/abs/gr-qc/9906059

Differential Geometry
- Lecture notes for a course at the Weizmann Institute of Science by Sergei Yakovenko. Chapters in DVI.
- http://www.wisdom.weizmann.ac.il/~yakov/Geometry/

Finite Canonical Commutation Relations
- A working paper on FCCR nxn matrices as local kinematical replacement for CCR, and representations by pxp matrices over Galois fields.
- http://graham.main.nc.us/~bhammel/FCCR/fccr.html

John Oprea's Home Page
- This site includes references to the author's papers and books, including Differential Geometry and its Applications and The Mathematics of Soap Films: Explorations with Maple. There are also Maple files available for downloading.
- http://www.csuohio.edu/math/oprea

ArXiv Front: DG Differential Geometry
- Differential geometry section of the mathematics e-print arXiv.
- http://front.math.ucdavis.edu/math.DG

Riemannian Geometry
- Mostly a definition with a few equations.
- http://www.treasure-troves.com/math/RiemannianGeometry.html

Differential Geometry Page
- Contains several figures which are the result of easy codes using Mathematica, including Enneper's surface.
- http://math.bu.edu/people/carlosm/Diffeo.html